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# sm
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[`sm`在线教程](https://arthas.aliyun.com/doc/arthas-tutorials?language=cn&id=command-sm)
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::: tip
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查看已加载类的方法信息
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:::
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“Search-Method” 的简写，这个命令能搜索出所有已经加载了 Class 信息的方法信息。
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`sm` 命令只能看到由当前类所声明 (declaring) 的方法，父类则无法看到。
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## 参数说明
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| 参数名称 | 参数说明 |
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| --------------------: | :------------------------------------------- |
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| _class-pattern_ | 类名表达式匹配 |
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| _method-pattern_ | 方法名表达式匹配 |
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| [d] | 展示每个方法的详细信息 |
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| [E] | 开启正则表达式匹配，默认为通配符匹配 |
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| `[c:]` | 指定 class 的 ClassLoader 的 hashcode |
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| `[classLoaderClass:]` | 指定执行表达式的 ClassLoader 的 class name |
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| `[n:]` | 具有详细信息的匹配类的最大数量（默认为 100） |
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## 使用参考
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```bash
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$ sm java.lang.String
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java.lang.String-><init>
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java.lang.String->equals
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java.lang.String->toString
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java.lang.String->hashCode
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java.lang.String->compareTo
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java.lang.String->indexOf
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java.lang.String->valueOf
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java.lang.String->checkBounds
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java.lang.String->length
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java.lang.String->isEmpty
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java.lang.String->charAt
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java.lang.String->codePointAt
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java.lang.String->codePointBefore
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java.lang.String->codePointCount
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java.lang.String->offsetByCodePoints
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java.lang.String->getChars
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java.lang.String->getBytes
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java.lang.String->contentEquals
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java.lang.String->nonSyncContentEquals
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java.lang.String->equalsIgnoreCase
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java.lang.String->compareToIgnoreCase
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java.lang.String->regionMatches
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java.lang.String->startsWith
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java.lang.String->endsWith
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java.lang.String->indexOfSupplementary
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java.lang.String->lastIndexOf
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java.lang.String->lastIndexOfSupplementary
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java.lang.String->substring
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java.lang.String->subSequence
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java.lang.String->concat
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java.lang.String->replace
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java.lang.String->matches
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java.lang.String->contains
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java.lang.String->replaceFirst
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java.lang.String->replaceAll
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java.lang.String->split
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java.lang.String->join
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java.lang.String->toLowerCase
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java.lang.String->toUpperCase
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java.lang.String->trim
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java.lang.String->toCharArray
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java.lang.String->format
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java.lang.String->copyValueOf
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java.lang.String->intern
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Affect(row-cnt:44) cost in 1342 ms.
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```
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```bash
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$ sm -d java.lang.String toString
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declaring-class java.lang.String
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method-name toString
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modifier public
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annotation
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parameters
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return java.lang.String
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exceptions
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Affect(row-cnt:1) cost in 3 ms.
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```
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